Presidium Multi Tester III (PMuT III) All-in-One Instrument for Testing Diamonds, Moissanites and Diamond Simulants

Initially I thought this multi tester was unreliable. Turns out I was the weak link. After reading other reviews and watching the product videos, I realized I wasn’t putting adequate pressure on the stone. After being mindful of the stone cleanliness, probe angle, and pressure, I’m identifying stones with precision. This is a prograde device which does require practice and patience. I’m extremely happy with the purchase.

The Diamond Tester falls short in several key areas, making it a less reliable choice for those needing accurate gemstone assessments. Its performance is inconsistent, often failing to distinguish between diamonds and simulants effectively. This can lead to confusion and potential errors, especially when assessing valuable or delicate stones. The build quality is also lacking, with a flimsy design that feels less durable than expected. Frequent calibration issues can result in unreliable readings, requiring constant adjustments to maintain accuracy. The user interface is not as intuitive as one would hope, making the testing process more cumbersome than necessary. Additionally, the display is small and hard to read, which can be frustrating during detailed examinations. The overall functionality does not justify the investment, particularly when compared to other more reliable and accurate testers on the market. Customer support is reportedly slow to respond, which is a drawback if issues arise. For those serious about gemstone testing, it’s worth considering alternatives that offer better reliability and accuracy. Overall, the Diamond Tester fails to deliver on its promises, making it a less advisable choice for enthusiasts and professionals alike.

Husband wanted me to buy this to keep kin my purse for the "haters" he got me a big diamond ring lol . Works very well everytime def worth the price, not some crappy one u can get.

The tester is easy to use and appears pretty accurate based on testing with stones known to be diamonds and fakes. Doesn’t work if stone is so small that can’t avoid the metal. But think that would be true if other comparable testers.

Despite what you read in some of the one-start reviews, this tester works and works very well. We have several of them. We test way more diamonds than most people or businesses in a lifetime, and it works fine. I suspect that those who claim that diamonds test moissanite are probably testing 2 or 3 point stones, they may be dirty, or they may actually be Moissanites. We occasionally come across Moissanites, but they are not common. This is a good tester, don't be swayed by those negative nellies.

Fits well in the hand. Seems quite accurate, but testing tiny stones is a challenge because the probe can touch the metal and in a few cases the very tiny stones registered as moissanite. I like that cz doesn't register and that white topaz and white sapphire show as simulants. AC adapter needs to be purchased seperately.

Horrible, I must have a bad unit. Bought in January and we haven't had to use it much till this last month. It reads certified GIA and IGI diamonds as both diamond and moissanite. Useless. Maybe Inhave a defective one but don't chance it.

Very accurate tester. All my moissanite jewelry came up as moissanite. All my diamond jewelry came up as diamond. Does the job. 5/5

El producyo aparenta muy buena calidad, pero no es lo que promete. Tengo casos en los que un diamante HPHT es leido como diamante cuando esta sobre la placa de aluminio suministrada y una vez montado en oro lo lee como Moissanita. Casos en los que pequeños diamantes naturales los lee como Moissanitas. Y casos en los que a las Moissanitas las lee como diamantes.. Aun limpiando, aun cambiando pilas, aun verificando angulo de toma, aun con todo lo que se recomienda hacer, lls errores de lectura son persistentes, por lo que no es confiable su uso. para eso, vale mas comprar un diamond selector de 150 pesos (conductividad termica) y un Moissanita terster de 150 pesos (conductividad electrica) y con menos del 10% de lo que vale este producto tienes los mismos o incluso mejores resultados de lectura, ya que con esos aparatos baratos si temgo lecturas persistentes de lo que se trata.

I received without a cover tip and used, the packaging is damage and worn out.

Works well and easy to use.

Works as advertised. Also checks the crystals on my watches, showing if they are mineral glass or sapphire. Great little gadget to have.

It's a little expensive but it's doze the job well.